CN108322076A - A kind of Pressure and Control system and method for AC system parallel connection H bridge type current transformers - Google Patents
A kind of Pressure and Control system and method for AC system parallel connection H bridge type current transformers Download PDFInfo
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- CN108322076A CN108322076A CN201810141406.XA CN201810141406A CN108322076A CN 108322076 A CN108322076 A CN 108322076A CN 201810141406 A CN201810141406 A CN 201810141406A CN 108322076 A CN108322076 A CN 108322076A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/493—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of pressure equalizing control methods of AC system parallel connection H bridge type current transformers, by introducing reactive component command value in AC voltage controller, each module DC voltage deviation is generated into reactive current deviation in DC voltage balance controller simultaneously, to realize redistributing for active power between each module under conditions of not influencing entire current transformer total active power, and then realize the Balance route of each module DC voltage, since this method can be designed alternating voltage reactive component voltage instruction value to adjust the size of active power deviation between each module, it thus can ensure that and realize that each module DC voltage is balanced in system power amplitude gamut, the present invention is not necessarily to DC side extra resistance, device volume can thus be reduced and improve system effectiveness, it has a good application prospect.
Description
Technical field
The invention belongs to electronic power convertor control technology field more particularly to a kind of AC system parallel connection H bridge types
The Pressure and Control system and method for current transformer.
Background technology
With the access of more and more power electronic elements in AC electric power systems, the interaction between them is easily drawn
Hair system small-signal stability problem, and the problem can by investigate the relationship on system busbar between each port Impedance come into
Row analysis, therefore the measurement of Practical Project middle port impedance is most important for analysis system stability.AC system port hinders
The basic principle of anti-measurement is：The current or voltage disturbance for injecting specific frequency certain amplitude to system port first, then carries
Voltage or current-responsive of the port at the frequency are taken, and then calculates the port Impedance at the frequency.Since disturbance needs to note
Enter into power port, need to bear system high voltage or high current, thus disturb injection be in entire impedance measurement the most
The key link.
Disturbance injection is divided to injection and series connection two classes of injection in parallel, parallel connection injection to be used to accurately measure impedance on busbar relatively low
Port, series connection injection is for accurately measuring the higher port of impedance.There are mainly two types of realization methods at present for series connection disturbance injection, i.e.,
Bridge-type current transformer based on coupling transformer and parallel connection H bridge type current transformers, the latter may be implemented due to avoiding coupling transformer
Low-frequency excitation injects, for realizing that wide-band impedance measurement is of great significance.
Fig. 1 gives the basic structure of H bridge types current transformer in parallel, due to H in parallel so that H bridge module number Ns are equal to 3 as an example
Bridge type current transformer DC bus capacitor suspends, thus needs to control its voltage；While in order to make system power in each module
Between divide equally, need to control each module ac-side current.Fig. 2 gives the total of H bridge types converter control system in parallel
Body structure receives the disturbance voltage instruction of top level control device, then by acquiring each module DC voltage, each module first
Ac-side current, output AC voltage and system power, after control system is handled, output control signal controls respectively
The break-make of full-control type power semiconductor inside each H bridge modules finally makes in ac output end mouth output voltage comprising disturbance
Component of voltage.
Existing parallel connection H bridge type converter control systems, when system power amplitude is smaller, it can be achieved that each module DC side is electric
Balance route between pressure, each voltage is equal at this time；When system power amplitude be more than a certain particular value (and the particular value be much smaller than volume
Definite value) when, each module DC voltage is cannot achieve, there are larger differences between each voltage at this time, and then can trigger overvoltage and protect
It protects and lead cause to shut down, and then seriously constrains the range of operation of H bridge types current transformer in parallel.In addition, in the prior art also by each
For module DC side parallel extra resistance come each DC voltage Balance route when realizing that system power amplitude is larger, the program can be
System power amplitude range of operation is improved to a certain extent, but the introducing of extra resistance will cause device volume to increase, system
Loss increases.
Invention content
The purpose of the present invention is to provide a kind of Pressure and Control system and method for AC system parallel connection H bridge type current transformers,
With overcome the deficiencies in the prior art.
In order to achieve the above objectives, the present invention adopts the following technical scheme that.
A kind of pressure equalizing control method of AC system parallel connection H bridge type current transformers, includes the following steps：
Step 1) obtains alternating voltage active component amplitude command value vCpm by mean direct voltage controller*；
Step 2) obtains system power i by phaselocked loopSFundametal compoment phase theta cosine value and sine value；
Step 3), the alternating voltage active component amplitude command value obtained according to step 1) by AC voltage controller with
And the obtained cosine value of fundametal compoment phase theta of step 2) and sine are worth to each H bridge modules alternating current unified instruction value iL *；
Step 4) obtains each H bridge modules alternating-current bias command value i by DC voltage balance controllerLdk *；
Step 5), the alternating current unified instruction value i for exporting AC voltage controllerL *With DC voltage balance controller
The alternating current offset instructions value i of outputLdk *Corresponding H bridge modules alternating current command value i is obtained after adductionLk *；Then by iLk *
With the practical alternating current i of corresponding H bridge modulesLkIt is inputted as fixture for Ac-regulating after making difference, output is that corresponding H bridge modules account for
Sky ratio dk, it is input to the pulse width modulator for being connected to each H bridge modules, you can realize the Pressure and Control of H bridge type current transformers.
Further, in step 1), each H bridge modules DC voltage is acquired by mean direct voltage controller first
vdck, then each H bridge modules DC voltage v is calculated by the AVE modules in mean direct voltage controllerdckAverage valueBy DC voltage command value vdc *With average valueIt is used as direct current voltage regulator G after making differenceVDCInput, and then obtain
Alternating voltage active component amplitude command value vCpm *。
Further, in step 2), phaselocked loop acquisition system electric current filters out wherein noise, output system current first harmonics point
Measure phase theta：
iS1=ISmcosθ
Wherein iS1For system power fundametal compoment instantaneous value, ISmFor fundamental current amplitude.
Further, in step 3), cosine value and the step 1) of the fundametal compoment phase theta obtained according to step 2) are averaged directly
The alternating voltage active component amplitude command value v of galvanic electricity pressure controller outputCpm *It is multiplied, while the fundamental wave obtained according to step 2)
The sine value of component phase θ and given alternating voltage reactive component amplitude command value vCqm *It is multiplied, after two product additions
It is superimposed alternating voltage upper layer command value vp *Obtain alternating voltage command value vC *；By alternating voltage command value vC *Sampling is subtracted to obtain
Alternating voltage actual value vCAfter obtain numerical value be ac voltage regulator GVCInput, you can obtain each H bridge modules alternating current
Unified instruction value iL *。
Further, in step 4), each H bridge modules DC voltage is acquired simultaneously by DC voltage balance controller
Calculate their average valueThen by average valueRespectively at each H bridge modules DC voltage vdckIt is poor to make, and obtains each H
Deviation between bridge module DC voltage and their average values, and it is balanced using these deviations as each H bridge modules DC voltage
Adjuster GILTInput, the sine value of the fundametal compoment phase theta then obtained according to step 2) and each H bridge modules DC voltage
The output of propertional regulator is multiplied to get to each H bridge modules alternating-current bias command value iLdk *。
A kind of Pressure and Control system of AC system parallel connection H bridge type current transformers, including mean direct voltage controller, locking phase
Ring, AC voltage controller, DC voltage balance controller, AC current control device and pulse width modulator, mean direct voltage
The output end of controller is connected to the input terminal of alternating voltage control unit, and the output end of phaselocked loop is connected to alternating voltage control
The input terminal of the input terminal and DC voltage balance controller of unit, the output end and DC voltage of alternating voltage control unit are equal
The output end of weighing apparatus controller is connected to the input terminal of AC current control device, and AC current control device connects with pulse width modulator
It connects；
Mean direct voltage controller is for obtaining alternating voltage active component amplitude command value vCpm *,
Phaselocked loop is for obtaining system power iSFundametal compoment phase theta,
Alternating voltage control unit is for obtaining each H bridge modules alternating current unified instruction value iL *,
DC voltage balance controller is for obtaining each H bridge modules alternating-current bias command value iLdk *；
Pulse width modulator is used to each H bridge modules control duty cycle conversion be corresponding H bridge modules internal power semiconductor device
The break-make of part controls signal.
Further, AC current control device and pulse width modulator connect one to one with H bridge modules.
Compared with prior art, the present invention has technique effect beneficial below：
The present invention provides a kind of pressure equalizing control methods of AC system parallel connection H bridge type current transformers, by alternating voltage
Reactive component command value is introduced in controller, while in DC voltage balance controller that each H bridge modules DC voltage is inclined
Difference generates reactive current deviation, to be realized under conditions of not influencing entire current transformer total active power between each H bridge modules
Active power is redistributed, and then realizes the Balance route of each H bridge modules DC voltage, since this method can be to alternating current
Pressure reactive component voltage instruction value is designed to adjust the size of active power deviation between each module, thus be can ensure that and be
Realize that each module DC voltage is balanced in current amplitude gamut of uniting, the present invention is not necessarily to DC side extra resistance, thus can reduce
Device volume and raising system effectiveness, have a good application prospect.
Description of the drawings
Fig. 1 is the main circuit diagram of parallel connection H bridge type current transformers.
Fig. 2 is control system overall structure of the present invention.
Fig. 3 is mean direct voltage controller internal structure of the present invention.
Fig. 4 is AC voltage controller internal structure of the present invention.
Fig. 5 is DC voltage balance controller internal structure of the present invention.
Fig. 6 is AC current control device internal structure of the present invention.
Fig. 7 is the experimental waveform figure using pressure equalizing control method proposed by the present invention.
Fig. 8 is the experimental waveform figure using existing control method.
Specific implementation mode
The present invention is described in further detail below in conjunction with the accompanying drawings：
As shown in Figure 1, parallel connection H bridge type current transformers include the H bridge modules of N number of parallel connection, N is not less than 2, inside each H bridge modules
It is connected and composed by the four 4 full-control type power semiconductors with anti-paralleled diode, each H bridge modules DC side is connected to respectively
From DC capacitor Ck, exchange side passes through inductance LkMouth is connected to the output after parallel connection, while in output port parallel connection ac capacitor
Cp；H bridge types current transformer in parallel is connected in AC system, and system power flows into from one leading-out terminal and from its another end
Subflow goes out.
As shown in Figures 2 to 6, a kind of parallel connection H bridge type converter control systems, including mean direct voltage controller, lock
Xiang Huan, AC voltage controller, DC voltage balance controller, AC current control device and pulse width modulator, mean direct electricity
The output end of pressure controller is connected to the input terminal of alternating voltage control unit, and it is voltage-controlled that the output end of phaselocked loop is connected to alternating current
The input terminal of the input terminal and DC voltage balance controller of unit processed, the output end and DC voltage of alternating voltage control unit
The output end of balance controller is connected to the input terminal of AC current control device, and AC current control device connects with pulse width modulator
It connects, pulse width modulator is used to each H bridge modules control duty cycle conversion be the logical of corresponding H bridge modules internal power semiconductor device
Disconnected control signal, AC current control device and pulse width modulator with the one-to-one connection of H bridge modules；
Mean direct voltage controller is for obtaining alternating voltage active component amplitude command value vCpm *,
Phaselocked loop is for obtaining system power iSFundametal compoment phase theta,
Alternating voltage control unit is for obtaining each H bridge modules alternating current unified instruction value iL *,
DC voltage balance controller is for obtaining each H bridge modules alternating-current bias command value iLdk *,
Pulse width modulator is used to each H bridge modules control duty cycle conversion be corresponding H bridge modules internal power semiconductor device
The break-make of part controls signal.
A kind of pressure equalizing control method of AC system parallel connection H bridge type current transformers, includes the following steps：
Step 1) obtains alternating voltage active component amplitude command value v by mean direct voltage controllerCpm *；
Step 2) obtains system power i by phaselocked loopSFundametal compoment phase theta cosine value and sine value；
Step 3), the alternating voltage active component amplitude command value obtained according to step 1) by AC voltage controller with
And the obtained cosine value of fundametal compoment phase theta of step 2) and sine are worth to each H bridge modules alternating current unified instruction value iL *；
Step 4) obtains each H bridge modules alternating-current bias command value i by DC voltage balance controllerLdk *；
Step 5), the alternating current unified instruction value i for exporting AC voltage controllerL *With DC voltage balance controller
The alternating current offset instructions value i of outputLdk *Corresponding H bridge modules alternating current command value i is obtained after adductionLk *；Then by iLk *
With the practical alternating current i of corresponding H bridge modulesLkIt is inputted as fixture for Ac-regulating after making difference, output is that corresponding H bridge modules account for
Sky ratio dk, it is input to the pulse width modulator for being connected to each H bridge modules, you can realize the Pressure and Control of H bridge type current transformers.
In step 1), each H bridge modules DC voltage v is acquired by mean direct voltage controller firstdck, then pass through
The AVE modules crossed in mean direct voltage controller calculate each H bridge modules DC voltage vdckAverage valueBy direct current
Voltage instruction value vdc *With average valueIt is used as direct current voltage regulator G after making differenceVDCInput, and then obtain alternating current and be pressed with
Work(component amplitude command value vCpm *；
Direct current voltage regulator GVDCUsing proportional and integral controller；
In step 2), phaselocked loop acquisition system electric current filters out wherein noise, output system current first harmonics component phase θ；
iS1=ISmcosθ
Wherein iS1For system power fundametal compoment instantaneous value, ISmFor fundamental current amplitude.
In step 2), system power i is obtained by phaselocked loopSFundametal compoment phase theta, and calculate fundametal compoment phase
The cosine value and sine value of θ；
In step 3), cosine value and step 1) the mean direct voltage control of the fundametal compoment phase theta obtained according to step 2)
The alternating voltage active component amplitude command value v of device output processedCpm *It is multiplied, while the fundametal compoment phase obtained according to step 2)
The sine value of θ and given alternating voltage reactive component amplitude command value vCqm *It is multiplied, is exchanged being superimposed after two product additions
Voltage upper layer command value vp *Obtain alternating voltage command value vC *；By alternating voltage command value vC *Subtract the alternating current that sampling obtains
It is compacted actual value vCAfter obtain numerical value be ac voltage regulator GVCInput, you can obtain each H bridge modules alternating current unified instruction
Value iL *；
In step 4), each H bridge modules DC voltage is acquired by DC voltage balance controller and calculates it
Average valueThen by average valueRespectively at each H bridge modules DC voltage vdckIt is poor to make, and it is straight to obtain each H bridge modules
Galvanic electricity presses the deviation between their average values, and using these deviations as each H bridge modules DC voltage propertional regulator GILT
Input, the sine value of the fundametal compoment phase theta then obtained according to step 2) and each H bridge modules DC voltage propertional regulator
Output be multiplied to get to each H bridge modules alternating-current bias command value iLdk *；
As shown in Figure 7, Figure 8, to control method proposed by the invention and traditional control method in same system current condition
Under carried out experiment test, in test system power first harmonic magnitude be 24A, system fundamental frequency be 60Hz, DC voltage instruction
Value vdc *For 130V, time domain waveform is obtained using four-way oscilloscope measurement, Fig. 7 is using the carried control method of the present invention
Oscillogram, Fig. 8 are the oscillogram using traditional control method, and channel 1 is #1H bridge module DC voltages v in figuredc1, channel 2 is #
2H bridge module DC voltages vdc2, channel 3 is alternating voltage vC, channel 4 is system power iS；
Obviously unbalanced, the DC voltage that can be seen that traditional control method lower module DC voltage from experiment test waveform
Between deviation exceed 10V, and control method using the present invention, deviation can be ignored between DC voltage, realize well
DC voltage is balanced.
Claims (7)
1. a kind of pressure equalizing control method of AC system parallel connection H bridge type current transformers, which is characterized in that include the following steps；
Step 1) obtains alternating voltage active component amplitude command value v by mean direct voltage controllerCpm *；
Step 2) obtains system power i by phaselocked loopSThe cosine value and sine value of fundametal compoment phase theta；
Step 3), the alternating voltage active component amplitude command value v obtained according to step 1) by AC voltage controllerCpm *With
And the cosine value and sine value of fundametal compoment phase theta that step 2) obtains, obtain each H bridge modules alternating current unified instruction value
iL *；
Step 4) obtains each H bridge modules alternating-current bias command value i by DC voltage balance controllerLdk *；
Step 5), the alternating current unified instruction value i for exporting AC voltage controllerL *It is exported with DC voltage balance controller
Alternating current offset instructions value iLdk *Corresponding H bridge modules alternating current command value i is obtained after adductionLk *；Then by iLk *With phase
Answer the practical alternating current i of H bridge modulesLkIt is inputted as fixture for Ac-regulating after making difference, output is corresponding H bridge modules duty ratio
dk, it is input to the pulse width modulator for being connected to each H bridge modules, you can realize the Pressure and Control of H bridge type current transformers.
2. a kind of pressure equalizing control method of AC system parallel connection H bridge type current transformers according to claim 1, feature exist
In in step 1), passing through mean direct voltage controller first and acquire each H bridge modules DC voltage vdck, then by average
AVE modules in DC voltage controller calculate each H bridge modules DC voltage vdckAverage valueBy DC voltage
Command value vdc *With average valueIt is used as direct current voltage regulator G after making differenceVDCInput, and then obtain active point of alternating voltage
Discharge amplitude command value vCpm *。
3. a kind of pressure equalizing control method of AC system parallel connection H bridge type current transformers according to claim 1, feature exist
In in step 2), phaselocked loop acquisition system electric current filters out wherein noise, output system current first harmonics component phase θ：
iS1=ISmcosθ
Wherein iS1For system power fundametal compoment instantaneous value, ISmFor fundamental current amplitude.
4. a kind of pressure equalizing control method of AC system parallel connection H bridge type current transformers according to claim 1, feature exist
In in step 3), the cosine value and step 1) mean direct voltage controller of the fundametal compoment phase theta obtained according to step 2) are defeated
The alternating voltage active component amplitude command value v gone outCpm *It is multiplied, while the fundametal compoment phase theta obtained according to step 2) is just
String value and given alternating voltage reactive component amplitude command value vCqm *It is multiplied, will be superimposed on alternating voltage after two product additions
Layer command value vp *Obtain alternating voltage command value vC *；By alternating voltage command value vC *It is practical to subtract the alternating voltage that sampling obtains
Value vCAfter obtain numerical value be ac voltage regulator GVCInput, you can obtain each H bridge modules alternating current unified instruction value iL *。
5. a kind of pressure equalizing control method of AC system parallel connection H bridge type current transformers according to claim 1, feature exist
In in step 4), being acquired to each H bridge modules DC voltage by DC voltage balance controller and calculate them and put down
Mean valueThen by average valueRespectively at each H bridge modules DC voltage vdckIt is poor to make, and obtains each H bridge modules DC voltage
The deviation between their average values, and using these deviations as each H bridge modules DC voltage propertional regulator GILTIt is defeated
Enter, the sine value of the fundametal compoment phase theta then obtained according to step 2) is defeated with each H bridge modules DC voltage propertional regulator
Go out to be multiplied to get to each H bridge modules alternating-current bias command value iLdk *。
6. a kind of control system of the pressure equalizing control method based on AC system parallel connection H bridge type current transformers described in claim 1,
It is characterised in that it includes mean direct voltage controller, phaselocked loop, AC voltage controller, DC voltage balance controller, friendship
The output end of galvanic electricity stream controller and pulse width modulator, mean direct voltage controller is connected to the defeated of alternating voltage control unit
Enter end, the output end of phaselocked loop is connected to the input of the input terminal and DC voltage balance controller of alternating voltage control unit
End, the output end of alternating voltage control unit and the output end of DC voltage balance controller are connected to AC current control device
Input terminal, AC current control device connect with pulse width modulator；
Mean direct voltage controller is for obtaining alternating voltage active component amplitude command value vCpm *,
Phaselocked loop is for obtaining system power iSFundametal compoment phase theta,
Alternating voltage control unit is for obtaining each H bridge modules alternating current unified instruction value iL *,
DC voltage balance controller is for obtaining each H bridge modules alternating-current bias command value iLdk *,
Pulse width modulator is used to each H bridge modules control duty cycle conversion be corresponding H bridge modules internal power semiconductor device
Break-make controls signal.
7. a kind of Pressure and Control system of AC system parallel connection H bridge type current transformers according to claim 6, feature exist
In AC current control device and pulse width modulator connect one to one with H bridge modules.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810141406.XA CN108322076B (en) | 2018-02-11 | 2018-02-11 | Voltage-sharing control system and method for parallel H-bridge type converter of alternating current system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810141406.XA CN108322076B (en) | 2018-02-11 | 2018-02-11 | Voltage-sharing control system and method for parallel H-bridge type converter of alternating current system |
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| CN108322076B CN108322076B (en) | 2020-03-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114070028A (en) * | 2021-11-19 | 2022-02-18 | 新风光电子科技股份有限公司 | Voltage-sharing control method of cascade bidirectional converter device |
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| JPH11112301A (en) * | 1997-10-03 | 1999-04-23 | Toyota Autom Loom Works Ltd | Power circuit |
| CN101295877A (en) * | 2008-06-05 | 2008-10-29 | 上海交通大学 | Control system of offshore wind power flexible DC power transmission current transformer |
| CN102522749A (en) * | 2011-11-10 | 2012-06-27 | 中冶华天工程技术有限公司 | H-bridge cascaded active power filter and control method thereof |
| JP2013255308A (en) * | 2012-06-05 | 2013-12-19 | Toshiba Corp | Semiconductor power conversion device |
| CN103944403A (en) * | 2014-05-09 | 2014-07-23 | 北京四方继保自动化股份有限公司 | Dynamic voltage-sharing control method for power module of chained multi-level converter |
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2018
- 2018-02-11 CN CN201810141406.XA patent/CN108322076B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11112301A (en) * | 1997-10-03 | 1999-04-23 | Toyota Autom Loom Works Ltd | Power circuit |
| CN101295877A (en) * | 2008-06-05 | 2008-10-29 | 上海交通大学 | Control system of offshore wind power flexible DC power transmission current transformer |
| CN102522749A (en) * | 2011-11-10 | 2012-06-27 | 中冶华天工程技术有限公司 | H-bridge cascaded active power filter and control method thereof |
| JP2013255308A (en) * | 2012-06-05 | 2013-12-19 | Toshiba Corp | Semiconductor power conversion device |
| CN103944403A (en) * | 2014-05-09 | 2014-07-23 | 北京四方继保自动化股份有限公司 | Dynamic voltage-sharing control method for power module of chained multi-level converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114070028A (en) * | 2021-11-19 | 2022-02-18 | 新风光电子科技股份有限公司 | Voltage-sharing control method of cascade bidirectional converter device |
| CN114070028B (en) * | 2021-11-19 | 2023-09-22 | 新风光电子科技股份有限公司 | Voltage equalizing control method of cascaded bidirectional converter device |
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| CN108322076B (en) | 2020-03-17 |
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